FEMA flood map notices
Flood map changes in Lawrence County, South Dakota
FEMA has published 2 flood hazard notices covering Lawrence County, South Dakota since November 2023. The most recent, map revision flood hazard determinations, was published Jul 9, 2026.
Notices for Lawrence County
- Jul 9, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 29 other counties
- May 18, 2026Map revisionChanges in Flood Hazard DeterminationsAlso covers 29 other counties
Also covered by these notices
FEMA often studies whole watersheds, so one notice can span several counties.
- Graham County, AZ
- Maricopa County, AZ
- Pima County, AZ
- Pinal County, AZ
- Alameda County, CA
- Contra Costa County, CA
- Fresno County, CA
- Orange County, CA
- Placer County, CA
- Riverside County, CA
- San Bernardino County, CA
- Tulare County, CA
- Ventura County, CA
- Adams County, CO
- Arapahoe County, CO
- Boulder County, CO
- Denver County, CO
- Ada County, ID
- Canyon County, ID
- Cass County, ND
- Clark County, NV
- Lyon County, NV
- Benton County, OR
- Clackamas County, OR
- Washington County, OR
- Meade County, SD
- Davis County, UT
- Weber County, UT
- Clark County, WA
What these notices mean
- Proposed
- FEMA has new draft flood maps. This starts a 90-day window when owners can appeal with technical data. It's the best time to act.
- Final
- Appeals are resolved. The new maps usually take effect about six months later, when lenders start applying the new zones.
- Map revision
- A Letter of Map Revision changes one stretch of the map, often after a levee, channel project or new survey.
Notices are organized by county and community, so a notice for your county doesn't mean your property is changing zones. What flood zones mean